A new series of N-[2-(2-aminothiazolyl)ethyl]-4-(substitutedphenyl)- 3-chloro-2-oxo-1-iminoazetidine, compounds 4(a-m) have been synthesized from 2-aminothiazole as a starting material. The structure of all the synthesized compounds were confirmed by chemical and spectral analyses such as IR, 1H NMR, 13C NMR and FAB-Mass. All the final synthesized compounds 4(a-m) were screened for their antibacterial and antifungal activities against some selected bacteria and fungi and antitubercular activity screened against M. tuberculosis with their MIC value. Antiinflammatory activity screened against albino rats (either sex) and gave acceptable results.